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(No Model.) 2 Sheets-Sheet 1. R. E. BOSGHERT.

SGREW PRESS.

No. 319,184. Patented June 2, 1885.

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(No Model.) 2 Sheets-Sheet 2.

R. E. BOSOHERT. SCREW RRESS.

No. 319,184. Patented June 2, 1885.

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RUFUS E. 'BOSOHERT, OF SYRACUSE, NEXV YORK.

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SPECIFICATION forming part of Letters Patent No. 319,184, dated June 2, 1885.

Application filed February 6, 1885. (No model.)

To all whom it may concern:

Be it known that 1, Bonus E. Bosonnn'r, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Screw Presses, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of screwpresses in which the screws are stationary and the head-block is moved by the nuts on the said screws; and the invention has special reference to the mechanism for transmitting motion to the aforesaid nuts, the object of the invention being to accomplish the said transmission of motion without changing the position of the belt-pulleys, and thus obviate slackness of the belts and the interference of the belts with the convenience of the operation of the press; and to that end my invention consists in the novel combination of parts, as hereinafter fully described, and specifically set forth in the claims.

In the annexed drawings, Figure I is a side elevation of my invention. Fig. If is an end elevation of the same with the belt-shifting levers removed. Figlll is an enlarged vertical transverse section illustrating more fully the detail construction of parts and their connection, and Fig. 1V is a detached plan view of the yoke which carries the sliding pinion.

Similar letters of reference indicate corresponding parts.

H represents the head'block of an upright screw-press.

S S denote the screws, arranged stationary in sets or pairs at the ends of the press, and N N the usual nuts applied to the screws S S, which nuts are provided with geared or tooth peripheries, which mesh into pinions O C, arranged, respectively, between the two pairs of screws. Said pinions receive rotary motion by the medium of bevel-gears A A, affixed to the shafts of said pinions and meshing in the bevel-pinions E E, attached to a horizontal drivingshaft, (1, arranged centrally over the press and parallel with the head-block.

Pulleys G (E secured to the shaft (1 and con nected by driving-belts with the main drivingpulley, (not shown,) impart rotary motion to the shaft 6, and a connter'shaft, e, arranged parallel with the shaft 1, and movable longitudinally and provided with gears Z Z Z of different diameters adapted to engage with gears g g g on the shaft (1, serves to regulate the motion of the shaft (1.

Since it is necessary to maintain the pinion C in engagement with the geared nuts NN, it has been customary to mount the shaft d with its pinions E E and the gear-wheels A A on the movable head-block, so that all the aforesaid co-operative mechanisms moved in commen with the headblock; but the objections to such arrangement are, the necessity of employing belt-tighteners for the purpose of maintaining the belts at the requisite tension during the elevation and depression of the head-block, and also the interference of the belts with the operator in working about the press. To obviate these objections the driving-shaft and its pulleys have been mounted on a stationary frame at the top of the press, and motion was transmitted from said drivingshaft to the nuts of the screws by means of a vertical shaft having affixed to its upper end a miter-gear meshing in a corresponding gear on the driving-shaft, abevel-pinion sliding on the lower end of the vertical shaft and connected therewith bya spline and groove engaged with a bevel-gear on a horizontal shaft mounted on the head-block at or near the center thereof, and frornsaid shaft motion was transmitted to the nuts of the press-screws by wornrshafts engaging worm-gears on the nuts. The entire strain was thus concentrated in the single vertical shaft, and the horizontal shaft, which is mounted on the head-block at the center thereof, was subjected to being disturbed in its requisite position in relation to the cooperating worm shafts and gears by the deflection of the head-block when under strain. Furthermore, worm-gears are generally considered inferior to straight gears in respect to their accuracy and durability in operation. These defects are obviated by my invention.

I arrange at opposite ends of the press, and respectively central between each pair of screws S S, two vertical shafts,B B, journaled at their upper ends in suitable boxes attached to the ends of the frame F, which is firmly secured to the upper ends of the screws S S S S. The shafts B B have affixed to their upper ends bevel gear-wheels A A, which mesh in the bevel-pinions E E of the driving'shaft (l,

which is mounted on the aforesaid stationary frame F. Below said frame are pinions G C, mounted loosely on the shafts B B. Said pinions are allowed to slide freely longitudinally on their shafts, and are confined circumferentially thereon by a spline, b, seated in the axial bearing of the pinion and sliding in a vertical groove, a,.in the shaft B.

Each of the aforesaid pinions O meshes in the geared peripheries of the nut N N of one of the pairs of screws S S, at the end of the press, and is maintained in engagement with the same by means of a yoke, D, which is connected with the head-block H by rocker-bearings ff, consisting of boxes attached to the washers w, and having journaled in them the ends of the yoke D. Said rocker-bearings allow the yoke to accommodate itself to the deflections and inequalities of the movements of the two sides of the head-block. The center of the yoke is provided with an aperture, 0. as shown in Fig. 4 of the drawings,and in said aperture is jonrnaled the pinion 0, having a prolonged hub extending through the aper ture of the yoke.

A collar, 0, is clamped on the hub of the pinion, below the yoke, to retain the pinion on the yoke, and between the collar and yoke I interpose a washer, h, the upper side of which is convexed, and the under side of the yoke which rests on said washer is concaved correspondingly, as shown in Fig. 3 of the drawings, thereby forming a ball-and-socket joint between the yoke and collar, and thus allowing the yoke to freely yield to any in equality in the movement of the two sides of the head-block.

It will be observed that in my invention I not only keep the drivingshaft and its pulleys and gears in one position and out of the way of the operator, but also transmit power to opposite ends of the press by very simple and effective means without encumbering the central portion of the head-block.

Having described my improvements, what I claim as new, and desire to secure by Letters Patent, is-

1. In a screw-press, the combination, with the movable head-block, the two sets of screws arranged stationary at opposite ends of the press, and the geared nuts on the screws, of a stationary frame at the top of the press, the driving-shaft mounted horizontally on said frame, centrally of the press and parallel with the headblock, bevel-pinions fixed to opposite ends of said shaft, a vertical. shaft between each set of screws at the ends of the press and provided with a vertical groove, bevel-gears on the upper ends of said vertical shafts, meshing in the aforesaid bevel-pinions, pinions sliding on the vertical shafts longitudinally and confined circumferentially thereon, and yokes connected with the sliding pinions and with the head-block, and carrying said pinions between the geared nuts, substantially as described and shown.

2. In combination with the stationary screws S S, geared nuts N N, movable head-block H,

connected to said nuts, vertical shafts B, provided with the groove a, and the sliding pinions O, connected with the shaft B by a spline, b, the yoke D, having journaled there on the pinion O, and connected with the headblock by rocker-bearings, to accommodate it self to the deflections and inequalities of the movement of the two sides of the head-block, substantially as specified.

3. In combination with the screws S S, movable head-block H, geared nuts N N, and vertical shaft B, the pinions O, sliding on said shaft lengthwise thereof and confined circumferentially thereon, the collar 0, clamped on the hub of the pinion O, the yoke D, having journaled thereon the aforesaid pinion and connected with the head-block, and a balland-socket joint between the collar 0 and yoke, substantially as and for the purpose set forth.

In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 2d day of February, 1885.

RUFUS E. BOSGHERI. 

